Fixing node.nodes.addAll to accept node lists.

tests/html/node_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library NodeTest;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 import 'dart:svg' as svg;
 
@@ skipping 141 matching lines @@
         new Element.tag('hr'),
         new Element.tag('img'),
         new Element.tag('input')
       ]);
       expect(node.nodes[0], isText);
       expect(node.nodes[1], isBRElement);
       expect(node.nodes[2], isComment);
       expect(node.nodes[3], isHRElement);
       expect(node.nodes[4], isImageElement);
       expect(node.nodes[5], isInputElement);
+
+      var a = makeNodeWithChildren();
+      var b = makeNodeWithChildren();
+      var childrenLength = a.children.length + b.children.length;
+      var nodesLength = a.nodes.length + b.nodes.length;
+
+      a.children.addAll(b.children);
+      expect(b.children.length, 0);
+      expect(a.children.length, childrenLength);
+
+      b.nodes.addAll(a.children);
+      expect(a.children.length, 0);
+      expect(b.children.length, childrenLength);
+
+      a.nodes.addAll(b.nodes);
+      expect(b.nodes.length, 0);
+      expect(a.nodes.length, nodesLength);
     });
 
     test('clear', () {
       var node = makeNodeWithChildren();
       node.nodes.clear();
       expect(node.nodes, []);
     });
 
     test('removeLast', () {
       var node = makeNodeWithChildren();
@@ skipping 26 matching lines @@
     });
 
     test('getRange', () {
       var range = makeNodeList().getRange(1, 2);
       expect(range, isNodeList);
       expect(range[0], isBRElement);
       expect(range[1], isComment);
     });
   });
 }